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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Effects of mature adipocyte-derived dedifferentiated fat (DFAT) cells on generation and vascularisation of dermis-like tissue after artificial dermis grafting.
Journal of Plastic Surgery and Hand Surgery 2015 Februrary
Although artificial dermis (AD) is effective for skin reconstruction, it requires two separate procedures, because the AD must be vascularised before skin grafts. To shorten the period of the dermis-like tissue generation before the secondary skin grafting must be beneficial. Dedifferentiated fat (DFAT) cells are isolated from mature adipose cell suspensions and have potential to differentiate into multiple cell types including endothelial cells. This study aimed to investigate effects of DFAT cells on dermal regeneration after AD grafts in rats. The effects of combination use of DFAT cells and basic fibroblast growth factor (bFGF) were also tested to mimic clinical situations. DFAT cells were isolated from SD rats. Full-thickness wounds were created on the back of rats followed by AD grafting. Five groups were established; Group I: control, Group II: treated with DFAT cells, Group III: treated with bFGF, Group IV: treated with both of DFAT cells and bFGF, and Group V: treated with Green fluorescent protein (GFP)-labelled DFAT cells and bFGF. Histological evaluation was serially performed. Group IV showed markedly promoted vascularisation of dermis-like tissue. In particular, capillary infiltration into the dermis was obtained within 2 days. Immunohistochemical examination revealed that the transplanted DFAT cells had differentiated into endothelial cells and participated in angiogenesis. Group IV also showed a marked increase in the thickness of the dermis like tissue. The present results suggest that the use of DFAT cells under bFGF treatment could be beneficial to shorten the period required for dermal regeneration and vascularisation and contribute to use AD more effectively and safely.
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